Bridge design

[Erwinspiano@AOL.COM]

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In a message dated 7/12/2002 10:31:34 AM Pacific Daylight Time, 
pianobuilders@olynet.com writes:


> Subj:Re: Bridge design 
> Date:7/12/2002 10:31:34 AM Pacific Daylight Time
> From:<A HREF="mailto:pianobuilders@olynet.com">pianobuilders@olynet.com</A>
> Reply-to:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A>
> To:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A>
> Sent from the Internet 
> 
> 
> 
>  
> >> ----- Original Message ----- 
>> From: <A HREF="mailto:pianobuilders@olynet.com">Delwin D Fandrich</A> 
>> To: <A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> 
>> Sent: July 11, 2002 11:37 PM
>> Subject: Re: Bridge design
>> 
>> 
>>            Del

                          Thanks 
     Pre-molded rib radius. That is slick. Makes sense. Any  observations  to 
tonal differences? /superiority of Lam. ribs verses crown cut ribs? I suspect 
not and any  tonal enhancement difference is in the design. Still on the 
learning curve.
  What about number of laminations? Have you found  an optimum? My thought is 
long deep ribs will require more thinner lams. or less thicker lams. and 
shorter ribs the same thing depending on some decision as to what's enough 
for adequate stiffness, consistency etc.
   Economically more lams. means more machining
    Dale Erwin

> >> >>>  
>> Consistency. Uniformity. Stability. And a predetermined and predictable 
>> crown radius -- we mold the various radii into the rib as it is being 
>> laminated.
>>  
>> Del
>>  
>> 
> They also save us time and we are able to use up excess soundboard stock 
> that would otherwise go to waste.
>  
> Del
>  
> 


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